ECUtune Stage 2 version 3 ( 2v3 ) - Page 6

#76 07-26-2005, 03:21 PM

chike of topic but i got your attention when installing your es bushings on the 11/16 ones u drilled out to 18mm. did u use a 18mm grinding bit. the closest i can find is 17.5 which is 11/16 at home depot and other spots. or did u use that size bit and wing it to 18mm? sorry for the hijacking ignore this.

Chiketkd · #77 07-26-2005, 06:20 PM

Quote:

Originally Posted by KCROGUEDOG

chike of topic but i got your attention when installing your es bushings on the 11/16 ones u drilled out to 18mm. did u use a 18mm grinding bit. the closest i can find is 17.5 which is 11/16 at home depot and other spots. or did u use that size bit and wing it to 18mm? sorry for the hijacking ignore this.

You know, Svxfiles might have found an 18mm grinding bit at Sears, but if you can't get your hands on one, using the 11/16" and grinding a little extra to reach 18mm will be just fine.

-Chike

svxfiles · #78 07-26-2005, 07:39 PM

Actually, I bought a 3/4" grinding ball, on a 1/4" shaft, at Lowes, and lightly ground it down on a bench grinder till it fit a 18mm open end wrench.

shotgunslade · #79 08-06-2005, 06:22 AM

I think, the other day, I may have experienced the topping out of the stock MAF that people have been describing. At WOT in second gear from about 6000rpm to the shift point at 6400-6500 rpm, there was a very slight but rapid shudder in the engine note. My only engine mods are Stage 1v4, the exhaust system and the green air filter, but the new exhaust system gives the engine a very continuous drone that wavered slightly in the above condition. That said, is there likely to be any benefit of Stage 2v3 for non-forced draft mods, such as porting and polishing or perhaps a larger throttle body?

longassname · #80 08-06-2005, 09:24 AM

The word thus far is that it pulls much better to red line. I've been told that where you can feel the power drop off in a stock car with manual transmission and know you need to shift that with stage2v3 it keeps pulling hard on up through 7000rpms. We'll have dyno results soon and then we'll really know what the benefit is for stock cars.

SilverSpear · #81 08-07-2005, 11:33 PM

Quote:

Originally Posted by longassname

The word thus far is that it pulls much better to red line. I've been told that where you can feel the power drop off in a stock car with manual transmission and know you need to shift that with stage2v3 it keeps pulling hard on up through 7000rpms. We'll have dyno results soon and then we'll really know what the benefit is for stock cars.

LAN, my car is still automatic, i am having the same symptoms... not just on high rpms but also you can feel that the accelerations has dropped from what they used to be... really i am not joking. Maybe the manual guys are not experiencing it becasue of the manual factor, but believe me i know my SVX by heart, and i am telling you the power has dropped.

When i sensed at first the shuddering in my car, i thought the tranny was going out, but after reading the postings over here, i knew what it was now...

longassname · #82 08-08-2005, 12:17 AM

I have no idea what you are trying to say. Acceleration has dropped from what because of what? None of us are talking about a loss of power below that of factory. We are talking about the possiblity that the factory equipment is limiting power at high rpms.

Quote:

Originally Posted by SilverSpear

LAN, my car is still automatic, i am having the same symptoms... not just on high rpms but also you can feel that the accelerations has dropped from what they used to be... really i am not joking. Maybe the manual guys are not experiencing it becasue of the manual factor, but believe me i know my SVX by heart, and i am telling you the power has dropped.

When i sensed at first the shuddering in my car, i thought the tranny was going out, but after reading the postings over here, i knew what it was now...

SilverSpear · #83 08-08-2005, 12:31 AM

Quote:

Originally Posted by longassname

I have no idea what you are trying to say. Acceleration has dropped from what because of what? None of us are talking about a loss of power below that of factory. We are talking about the possiblity that the factory equipment is limiting power at high rpms.

LAN, most of the guys now have manuals and are commenting on this issue, but really i am feeling a little lag in my automatic... I cleaned the air filter, i checked the spark plugs, i cleaned the intake manifold, I checked the alternator, the spark plugs wiring....etc... to see if they are the cause... I still feel a little loss of power when accelerating... or when going from 0 to 60... the car reacts better than stock, but less than the max performance i got after installing that chip... I still wanna check something before i hold to this comment, the exhaust system... Hold that thought.

longassname · #84 08-08-2005, 12:55 AM

I think you missread what the others have said. There are a couple of people having problems reaching the raised rev limit of 7400 rpms nobody said anything about power gains going away.

Quote:

Originally Posted by SilverSpear

LAN, most of the guys now have manuals and are commenting on this issue, but really i am feeling a little lag in my automatic... I cleaned the air filter, i checked the spark plugs, i cleaned the intake manifold, I checked the alternator, the spark plugs wiring....etc... to see if they are the cause... I still feel a little loss of power when accelerating... or when going from 0 to 60... the car reacts better than stock, but less than the max performance i got after installing that chip... I still wanna check something before i hold to this comment, the exhaust system... Hold that thought.

SilverSpear · #85 08-08-2005, 01:32 AM

Quote:

Originally Posted by longassname

I think you missread what the others have said. There are a couple of people having problems reaching the raised rev limit of 7400 rpms nobody said anything about power gains going away.

No i didn't misread that LAN, i am just adding to it. I may be wrong in my statement, just let me check the Aftermarket exhaust, maybe i have a decompression somewhere in it...

shotgunslade · #86 08-20-2005, 02:50 PM

Any progress on the dyno tests for the new chip?

longassname · #87 08-20-2005, 03:06 PM

Quote:

Originally Posted by shotgunslade

Any progress on the dyno tests for the new chip?

The guy we had dynoing for us is still waiting for the dyno operator to give him the print outs. The basic gist of his results were what I was expecting. The afr is moved .8 richer accross the board to better tune for forced induction. Because of the richer afr power drops of slightly above 4900 rpms where the afr gets below 12.4. This is the same as what we had seen during trial runs on the dyno when we developed the original stage 1 software.

When i developed the stage2v3 code I developed it for foced induction. There seems to be a lot of interest in using the z32 maf meter on na cars so I've decided to tune the 1st version of code that is on the adaptor for na. The second version of code on the adaptor is perfect for forced induction and is going to remain as is. Since stage 2 is for those more performance oriented I am going to be more aggressive in the changes in order to get more power. I will be bringing the lower rpm afr down closer to 12.5 and bringing the upper rpm afr up closer to 12.5. I will then take advantage of the new afr to increase ignition advance. Instead of just doing the ignition timing revision table which mainly affects part throttle around the town driving I will edit the base ignition advance table to get more wide open throttle power.

I'm doing the tuning this weekend and will call monday to schedule the dyno as early as it's available. I don't think there will be a very long wait.

Budfreak · #88 08-20-2005, 04:40 PM

Oh Happy Day!!

SVXRide · #89 08-20-2005, 04:50 PM

Quote:

Originally Posted by longassname

The guy we had dynoing for us is still waiting for the dyno operator to give him the print outs. The basic gist of his results were what I was expecting. The afr is moved .8 richer accross the board to better tune for forced induction. Because of the richer afr power drops of slightly above 4900 rpms where the afr gets below 12.4. This is the same as what we had seen during trial runs on the dyno when we developed the original stage 1 software.

When i developed the stage2v3 code I developed it for foced induction. There seems to be a lot of interest in using the z32 maf meter on na cars so I've decided to tune the 1st version of code that is on the adaptor for na. The second version of code on the adaptor is perfect for forced induction and is going to remain as is. Since stage 2 is for those more performance oriented I am going to be more aggressive in the changes in order to get more power. I will be bringing the lower rpm afr down closer to 12.5 and bringing the upper rpm afr up closer to 12.5. I will then take advantage of the new afr to increase ignition advance. Instead of just doing the ignition timing revision table which mainly affects part throttle around the town driving I will edit the base ignition advance table to get more wide open throttle power.

I'm doing the tuning this weekend and will call monday to schedule the dyno as early as it's available. I don't think there will be a very long wait.

Michael,
Outstanding!! Anyway you could swap in an Impreza (43psi) FPR on your engine before you do the dyno runs so those of us already running it don't end up running too rich with the 2v4 chip?
-Bill
p.s by "down closer to" you mean making a richer mixture and by "up closer to" you mean making a leaner mixture?

shotgunslade · #90 08-21-2005, 09:58 AM

So, does just substituting the Impreza FPR improve power without other mods on an NA engine? I am running the Green Filter and a Magnaflow exhaust, but no other mods.